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Finding the Fourth Proportional to 100,616.22, 138,840.78 and 60,322.50

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Solution

The fourth proportional to 100,616.22, 138,840.78 and 60,322.50 is: 83,239.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,616.22 : 138,840.78 = 60,322.50 : x
  2. Step 2: Convert to fraction form
    100,616.22/138,840.78 = 60,322.50/x
  3. Step 3: Cross multiply
    100,616.22x = 138,840.78 × 60,322.50
  4. Step 4: Simplify right side
    100,616.22x = 8,375,222,951.55
  5. Step 5: Solve for x
    x = 8,375,222,951.55/100,616.22
  6. Step 6: Final answer
    x = 83,239.29

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.